Generating a phi node

[Revital1 Eres]

Hello,

I have two ssa vars (i0 and i1 in the following example); what is the
sequence to generate a new phi node corresponding to i3 -

if (...)
     i0 = exp1

else
     i1 = exp2

i3 = PHI(i0 , i1);

Thanks,
Revital